So, here. My very first crack at an SCP. Technically speaking, the narrative presentation isn't complete. There's a few testlogs that need to be added and that I'm working on as we speak, although it's proving rather difficult. So, after about a month or so, I just want to get everyone's opinion before going forward.

Okay, here we go. This fell to page 4 without any replies, so I’m giving it a quick read. I’ll comment on specifics for the first 10 errors I notice, then move on to a skim-read until I hit the end or I lose interest in continuing. Please note that I do not comment on every single thing that I think needs fixing, unless the piece is exceptionally good. Here are my thoughts:

SCP-3XXX presents as of yet no meaningful risk of containment breach, but due to its importance and the lethal effect of its use it is > this is kind of bog-standard for Safe class objects. You don't need all the extra text explaining why this thing is contained the way it is. Just give the procedures.

double-locked and thus requiring the mutual agreement of two researchers to open > "requires two [Level] researchers to access"

the Ethics Committee has, as of 05/28/20— placed a moratorium on any further playbacks. > this seems unrelated to the portion of sentence preceding it. Plus there's already a semicolon in the previous bit, so having a dash too just makes for a run-on. This could start its own paragraph due to the subject focus being different (storage vs. playback protocol).

Although any powered electronic or analog system capable of playing back VCRs and DVDs can be used in conjunction with SCP-3XXX > again, description-y stuff shouldn't be in the containment procedures.

have set aside one (1) Panasonic PV-V4250, > Generally, the number (#) numeration is used for extreme precision measurements that can be fatal if misinterpreted, like drug prescriptions. Alternatively, it's for legal reasons to avoid ambiguity. You don't need to do that here with easy to count whole numbers like one.

Precise chemical and atomic analysis of the case, disc, and cover art pigments has revealed no apparent anomalous properties. > too much text to say that it does not exhibit any physical anomalies.

At this point, SCP-3XXX will be seen to radically shift in cover content, art, listed information, and in a few recorded cases format. > seems like an oversight to not label or tag the object somehow. How would the Foundation be able to distinguish the anomalous thing from non-anomalous DVDs and whatnot without someone actively handling it all the time?

For VHS tapes (those go in VCRs right?) what happens if the tape is rewound?

(New information has placed this in doubt: see Addendum 3XXX-05) > missing punctuation at the end. Also, this might be better as a footnote.

Although still a topic of doubt and minor controversy among SCP-3XXX researchers, it is now strongly suspected that certain aspects of playbacks may, in fact, be anticipating events that would have been in the future of the handler had their life continued; the playback reviews should be consulted for more details. > this is one sentence. The rest of the article suffers similarly from excessively long prose like this.

Overall, the writing looks sound, but it kind of… feels like the reader is being drowned in a lot of unnecessary fluff text. The base concept, as a result is a little lost in the shuffle for me. To confirm, this is an anomalous media device thing that when handled by one person and put into a device that can play the media, causes the handler to go into a coma and puts them into the media played? And then they die?

I admit I'm not too sure about this, mainly because I couldn't help but feel like there wasn't really a reason for these people to die or even be put in a coma to begin with. Why does that need to happen? Is it supposed to be a narrative hint at something? It just felt a little random and abrupt to me.